Filtering material and process of filtering



.latentedduly 3,1928 v V p sA a RALPH H. MoKEE, OF NEW YORK, N. Y. 1. i

FILTERING MATERIAL AND rnoonss orrIL rnRInG.

v No Drawing. Application filed. September 16, 1924. Seri a1No. 738,106.

This invention relates to filtering mate- During its passage through the bed, the acids, rials and processes of filtering. bases,'and' oils are substantially all removed 40 In the recovery of shale oilfrom oil shale, and relatively pure water obtained. When a great deal of difficulty is encountered in i the filter bed has been employed for a length the disposal of'the waste waters. These of timeandhas become fairly Contaminated waste waters are contaminated ,with oil, with the impurities from the water, 'thelayer basic materials, andacids, and are likely tov shouldbe removed and replaced by a layervag V provenuisances 1f returned vto rivers or other of fresh material. k

' streams in this condition. j, 'lVhile I have described in detail the .pre-,

10 n An object of the present invention is to ferred practice of my process, it is to be provide an inexpensive method of removing u -derstood that the details ofprocedure may impurities from the waste water and thus be widely varied Withoutdepartin permit the water, in itspuritied state, to be the spirit of the invention or the scope "of returned to the stream without contaminzit the subjoined claims. 7 I f ing the river, or other stream, and permit-i v I claim: I v ting use of thewa'ter for-various purposes, 1. A material for use in purifying water such as irrigation, steam raising, etc. consisting of the untreated residue obtained 55 A further object of the inventionis to in the distillation of oil shale.

1 employthe residue of oil shale from which 2. The process of purifying waterwhich. 2 shale oil has been removed, as a filtering comprises passing the water to be purified dium, through a body of untreated residue ob- The residue from oil shale distillation has tained from the. distillation of oil' shale. so

decided adsorptive powers andby running 8. The process of purifying water which the waste wash waters through a layer of comprises passing the water to be purified'iw 'suchresidue, the acids, bases, and oils will through a shallow layer of untreated resi-j be removed, and substantially pure water due obtained from the distillation of oil will be obtained. In practicing the process, shale. I f y p it is merely necessary topass these waste a. The process of removing oils, basesfand waters through a shallow layer of the resiacids from wash water employed in the due. The layer or bed should, however, be manufacture of shale oil from' oil shale renewed from "time to time. p which comprises passing the water to be Any suitable apparatus may be employed purified through arshallow layer of the un- 79 in practicing theprocess. The wash water treated residue obtained in the distillation employed in obtaining the shale oil may be of said oil shale.

delivered to a filter bed or similar apparatus In testimony whereof, afiix my signa- ,in which the oil shale residue is arranged in ture. v y a shallow layer and the water permitted to y I a I pass through the layer or bed of material. I i MCKEE. 

